Message app Signal, used by NSA Waltz, under probe for possible breach

TeleMessage, the message-archiving app that former National Security Adviser Michael Waltz appeared to be using in a photograph of him communicating with other Trump administration officials, is investigating whether hackers exploited its technology.

A spokesperson for TeleMessage confirmed the inquiry in a statement on Monday and said the app’s services have been temporarily suspended. Owned by the Portland, Oregon-based software company Smarsh Inc.,